01121cam a22003131 4500 e 18000176 DLC 20260227111208.0 cr_||||||||||| cr_||||||||||| cr_||||||||||| 810306s1917 vau 000 0 eng c e 18000176 (OCoLC)7199271 Library, U.S. Vi DLC premarc LB3033 .H4 Heck, William Harry, 1879- A study of school recesses. [Charlottesville, Va.] The University [1917] 22 p. 23 cm. University of Virginia record. Extension ser., vol. III, no. 1, September, 1917 Also available in digital form on the Internet Archive Web site. Also available in digital form on the Internet Archive Web site. Also available in digital form on the Internet Archive Web site. http://hdl.loc.gov/loc.gdc/scd0001.0021496983A http://hdl.loc.gov/loc.gdc/scd0001.0021496983A http://hdl.loc.gov/loc.gdc/scd0001.0021496983A 20159 20159